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Theories and studies
Theories abound about the energy storage potential of floppy tendons and the 
torque-producing talent of stretched muscle fibres. But some experts simply believe a lot of people stretch because they’ve been brought up to believe that it is the right thing to do. So what is this steady accumulation of evidence to suggest static stretching may be a hindrance rather than a help?
Well, most Kenyan endurance athletes don’t tend to stretch at all. And they’re pretty good at this running lark! But there also seems to be a growing number of scientific studies that claim that stretching beforehand makes you run more slowly and less efficiently.
One study from Florida State University earlier this year effectively sounded the death knell for static stretching before running. The paper, which was published in the Journal of Strength and Conditioning Research, examined 10 male runners. Before a treadmill test run, they either sat quietly for 16 minutes or did 16 minutes of static stretching. They then ran for 60 minutes on the treadmill – the first 30 minutes at a relaxed pace and the last 30 minutes as fast as they could. The results? Eight of the 10 runners performed better without stretching. On average, the stretchers hit a maximum heart rate of five beats per minute higher than the non-stretchers in the final 30 minutes. In other words, the stretchers were working harder but covering less distance.
The study concluded: “Stretching before an endurance event may lower endurance performance and increase the energy cost of running.”
